\chapter{Troubleshooting}
In this section we will address several known problems with the \headset system.

\section{Performance}
\headset is a relatively heavy application to run, and on some hardware configurations, performance can be a problem. The following steps may help to improve performance when necessary.

\begin{itemize}
\item Make sure Anti-aliasing is disabled in the view port options (Viewports - > Configure Viewports...).
\item Make sure Double Buffering is enabled in the view port options (Viewports - > Configure Viewports...).
\item Use a single view port instead of multiple view ports where possible.
\item When using DICOM data, make sure to use a high Reduction value (95 or higher). 
\end{itemize}

\section{Known problems}
The following problems are known to occur within the \headset system. Where available, workarounds will be provided.

\begin{itemize}
\item When running \headset on OS X, the .hdt extension is not appended to saved project files.
\item When loading a file containing both tumour and safe path primitives, both appear in the same category in the Model Information list.
\item Using transparency can cause the model to appear "inside out" from certain angles.
\item View port names (left, right, etc.) do not necessarily correspond with the view they deliver.
\item Rotating a primitive by exactly 90 degrees using the numeric controls can cause unexpected effects.
\end{itemize}
